抄録
An equation of state for Refrigerant 502 has been proposed in a wide range of temperatures 170 to 500 K and of pressures 0 to 15 MPa, which corresponds to a density variation from 0 to 1686 kg/m3 including both the gaseous and liquid state. The equation was formulated based on the experimental data of PVT properties, saturated liquid density and vapor-liquid coxistence curve near the critical point which we evaluated to be reliable. The equation is expressed by reduced specific Helmholtz function. The thermodynamic consistency of the proposed equation of state is confirmed by examining behavior of calculated values concerning isochoric specific heat capacity, isobaric specific heat capacity and speed of sound with respect to temperature and pressure dependences of those properties.
